Book of Mathematics

Pi is the ratio of the circumference to the diameter of a circle, generally represented by the Greek letter π. It is a mathematical constant ubiquitous in mathematics and physics. π Is also equal to the ratio of the area of ​​a circle to the square of its radius. It is a key value for accurately calculating geometric shapes such as circle circumference, circle area, and sphere volume. In analysis, π can be strictly defined as the smallest positive real number x that satisfies sinx=0 Pi is represented by the Greek letter π pronounced as pài. It is a constant approximately equal to 3.** And represents the ratio of the circumference and diameter of a circle. It is an irrational number, that is, an infinite non-repeating decimal. In daily life, 3.14 Is usually used to represent pi for approximate calculations. However, using 3.** To ten decimal places is sufficient for general calculations. Even if engineers or physicists want to perform more precise calculations, they only need to take values ​​to a few hundred decimal places at best. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.